yesterday paul ryan was grilled about it on, of all places, fox news. let's watch. >> how much would it cost? >> it's revenue neutral. >> i'm just talking -- we'll get to -- >> the cut in tax rates will lower all americans' tax rates by 20%. >> how much does that cost? >> it's revenue neutral. lowering tax rates by broadening the tax base works. >> you haven't given me the math. >> i don't have the time -- it would take me too long to go through all the math. >> this is not the first time romney was challenged, or ryan, on the vagueness of the proposal. back in 1994 romney talked about a plan to tackle health care up in massachusetts. actually nationwide. but never explained what the cost would be, the cost of the program. his opponent in the race back then was ted kennedy memorably challenging him on that debate. let's watch how it's done. here is where you challenge a guy to come clean, especially when he can't do it. let's watch. >> they ought to have an opportunity to know. what is the cost of your program? >> i don't have a cost of my program. >> y